Simple Ruby OOP example

gistfile1.rb

class RentalCar
  attr_accessor :miles_travelled

  def check_maintenance
    if @miles_travelled > 60000
      puts "Give it a tuneup!"
    end
  end
end

car1 = RentalCar.new

car1.miles_travelled = 100000

car2 = RentalCar.new

car2.miles_travelled = 0

car1.check_maintenance # prints 'Give it a tuneup!'

car2.check_maintenance # prints nothing